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US2938965A
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US
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Magnetic recording and reproducing unit
Assignee: WH Sanders Electronics Ltd
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Filing: 1957-09-03
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Granted: 1960-05-31
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Expires: 1977-09-03
Abstract
No abstract record available.
Inventors
- 👤 Tutchings Alec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:51
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/08; G11B15/00; G11B15/18; G11B15/1808; G11B15/60; G11B15/66; G11B15/665; G11B15/6653; G11B15/6656; G11B3/00; G11B3/02; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/48; G11B5/52; G11B5/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1803403A
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US2084947A
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US2029730A
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US2490771A
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US2625611A
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US2633362A
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US2694110A
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US2694577A
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US2828367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |